#include<stdio.h>
#include<stdlib.h>
void l_Randomwrongevaluation()
{
    int i;
    i = rand() % 4 + 1;
    switch (i)
    {
    case 1:
        printf("No.Please try again.\n");
        break;
    case 2:
        printf("Wrong.Try once again.\n");
        break;
    case 3:
        printf("Don't give up!\n");
        break;
    case 4:
        printf("Not correct.Keep trying.\n");
        break;
    default:
        printf("Wrong type!\n");
    }
}